20. A trapezoidal open channel has a bottom width of 1.34m and its sides slope is 45•00'. Theconstant height of water is 2. 20m. determine the cross sectional area of the stream up to thatlevel.a) 9.455sqmb) 8.456sqmc) 7.755sqm21. The elevation above sea level of two end poits of a base line for a triangulation system,as determined by differential leveling, are: 2,683.45m and 2,615.22m. Determine the meansea level length of the line if the actual measured horizontal length is 5,525.850m. Assumethe radius of the earth at the vicinity of the base line is 6, 423.349 km.a) 5523. 571mb) 5513.454mc) 5509.678m22. An object was observed from a triangulation station. The measured distance wasrecorded to 4985.78m. determine the combined effect of earth's curvature and atmosphericrefraction.a) 2.123mb. 1.789mc) 1.665m23. From a topographic survey, the elevations point A and B were determined to be 233.7mand 247.7m. Contour line are to be drawn that will cross the line AB. If the contour intervalis 2m, determine the how many contours that could be drawn along line AB.a)9b) 5c) 7

Answered: Image /qna-images/answer/ff63a0b4-e56e-45cb-8fa7-7058dc82a325.jpg

20. A trapezoidal open channel has a bottom width of 1.34m and its sides slope is 45°00'. The constant height of water is 2. 20m. determine the cross sectional area of the stream up to that level. a) 9.455sqm b) 8.456sqm c) 7.755sqm

20. A trapezoidal open channel has a bottom width of 1.34m and its sides slope is 45°00'. The constant height of water is 2. 20m. determine the cross sectional area of the stream up to that level. a) 9.455sqm b) 8.456sqm c) 7.755sqm

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.

Question

20. A trapezoidal open channel has a bottom width of 1.34m and its sides slope is 45•00'. The
constant height of water is 2. 20m. determine the cross sectional area of the stream up to that
level.
a) 9.455sqm
b) 8.456sqm
c) 7.755sqm
21. The elevation above sea level of two end poits of a base line for a triangulation system,
as determined by differential leveling, are: 2,683.45m and 2,615.22m. Determine the mean
sea level length of the line if the actual measured horizontal length is 5,525.850m. Assume
the radius of the earth at the vicinity of the base line is 6, 423.349 km.
a) 5523. 571m
b) 5513.454m
c) 5509.678m
22. An object was observed from a triangulation station. The measured distance was
recorded to 4985.78m. determine the combined effect of earth's curvature and atmospheric
refraction.
a) 2.123m
b. 1.789m
c) 1.665m
23. From a topographic survey, the elevations point A and B were determined to be 233.7m
and 247.7m. Contour line are to be drawn that will cross the line AB. If the contour interval
is 2m, determine the how many contours that could be drawn along line AB.
a)9
b) 5
c) 7

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